2.5 dividing integers ws day 2

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2.5 dividing integers ws day 2

  1. 1. Lesson 2.5 , For use with pages 77-81 Evaluate the expression when x = 3 and y = 17 . 1. 11 + 4 x 2. 6 y x
  2. 2. Lesson 2.5 , For use with pages 77-81 Evaluate the expression when x = 3 and y = 17 . ANSWER 34 ANSWER 5 1. 11 + 4 x 2. 6 y x
  3. 3. Dividing Integers Day 2 Lesson 2.5 Pages 77-81
  4. 4. EXAMPLE 3 Evaluating Expressions Evaluate the expression when a = –24, b = 8 , and c = –4 . Substitute values. Different signs, so quotient is negative. Substitute values. Multiply. Same sign, so quotient is positive. = 48 a. a b = – 24 8 b. ab c = – 192 – 4 = – 24 8 – 4 = – 3
  5. 5. Daily Homework Quiz For use after Lesson 2.5 Find the quotient. Evaluate the expression when k = – 36 , m = 6 , and n = 3 . 1. mn k 2. m + n k 3. m 2 + 4 n 2 2 k
  6. 6. Daily Homework Quiz For use after Lesson 2.5 Find the quotient. Evaluate the expression when k = – 36 , m = 6 , and n = 3 . 1. mn k ANSWERS 1 2 – 2. m + n k 3. m 2 + 4 n 2 2 k ANSWERS – 4 ANSWERS – 1
  7. 7. Order of Operations with Integers <ul><li>7 + -16 ÷ 4 x -2 = </li></ul><ul><li>(-14 + 6) 8 = </li></ul><ul><li>(-9 x- 8) ÷ (-4+8) = </li></ul><ul><li>-45 ÷ [63 ÷ (-56 ÷ -8)] = </li></ul><ul><li>11 [ (15 – -3)  -3] = </li></ul>
  8. 8. Order of Operations with Integers <ul><li>7 + -16 ÷ 4 x -2 = </li></ul><ul><li>(-14 + 6) 8 = </li></ul><ul><li>(-9 x- 8) ÷ (-4+8) = </li></ul><ul><li>-45 ÷ [63 ÷ (-56 ÷ -8)] = </li></ul><ul><li>11 [ (15 – -3)  -3] = </li></ul>15 -64 5 18 -66
  9. 9. Try these on your own <ul><li>15 + -9  3 </li></ul><ul><li>-32 – 9 x -2 + 7 </li></ul><ul><li>64  (-9 + -7) </li></ul><ul><li>41 + -14 -9 x 3 </li></ul>
  10. 10. Try these on your own <ul><li>15 + -9  3 </li></ul><ul><li>-32 – 9 x -2 + 7 </li></ul><ul><li>64  (-9 + -7) </li></ul><ul><li>41 + -14 -9 x 3 </li></ul><ul><li>12 </li></ul><ul><li>-7 </li></ul><ul><li>-4 </li></ul><ul><li>-1 </li></ul>
  11. 11. Homework <ul><li>Page 79 #18-36 </li></ul>
  12. 12. GUIDED PRACTICE for Examples 2 and 3 Substitute values. Multiply. Same sign, so quotient is positive. = 2 = – 42 – 21 Evaluate when a = –42, b = –3, and c = 7 . a bc a bc = – 42 – 3 7

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